Add Bot Head, Brain, and Neural Net entity avatar icons

[brionmario]

Purpose

Adds three agent-themed icons — bot_head, brain, neural_net — to the curated anonymous_entity avatar badge set, matching the same addition made to the JS SDK. Extends the set from 33 to 36 entries so it now covers applications, organizations, resource servers, and agents.

Approach

Bundled PNG assets at 1x/2.0x/3.0x for each new icon under assets/logo-icons/entity/ and added the three names to kAnonymousEntityNames. The directory is already registered as a whole in pubspec.yaml's asset list, so no manifest changes were needed. Updated the stale count/category doc comments in curated_logo_icons.dart/logo_spec.dart.

Related Issues

• Add a formal Avatar URI Spec thunderid#4182 — related (that issue tracks writing a formal avatar spec doc; this PR extends the icon set the spec would document, but doesn't itself address the issue)

Related PRs

• N/A

Checklist

• Followed the contribution guidelines.
• Manual test round performed and verified.
• Documentation provided. (Add links if there are any)
• Tests provided. (Add links if there are any)
  • Unit Tests
  • Integration Tests
• Breaking changes. (Fill if applicable)
  • Breaking changes section filled.
  • breaking change label added.

Security checks

• Followed secure coding standards in WSO2 Secure Coding Guidelines
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets.

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Review details

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: adb6fd24-b19a-4bcd-b3b9-8c8e95540aee

📥 Commits

Reviewing files that changed from the base of the PR and between e722925 and fca13d0.

⛔ Files ignored due to path filters (9)

• assets/logo-icons/entity/2.0x/bot_head.png is excluded by !**/*.png
• assets/logo-icons/entity/2.0x/brain.png is excluded by !**/*.png
• assets/logo-icons/entity/2.0x/neural_net.png is excluded by !**/*.png
• assets/logo-icons/entity/3.0x/bot_head.png is excluded by !**/*.png
• assets/logo-icons/entity/3.0x/brain.png is excluded by !**/*.png
• assets/logo-icons/entity/3.0x/neural_net.png is excluded by !**/*.png
• assets/logo-icons/entity/bot_head.png is excluded by !**/*.png
• assets/logo-icons/entity/brain.png is excluded by !**/*.png
• assets/logo-icons/entity/neural_net.png is excluded by !**/*.png

📒 Files selected for processing (2)

• lib/src/logo/curated_logo_icons.dart
• lib/src/logo/logo_spec.dart

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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